6.0.0

I'm extremely stupid and didn't commit as I go. To anyone reading this
I'm extremely sorry. A lot of these changes are very broad and I plan on
releasing Babel 6.0.0 today live on stage at Ember Camp London so I'm
afraid I couldn't wait. If you're ever in London I'll buy you a beer
(or assorted beverage!) to make up for it, also I'll kiss your feet and
give you a back massage, maybe.

packages/babel-cli/test/fixtures/babel/--blacklist/options.json

@@ -1,3 +0,0 @@
-{
-  "args": ["--blacklist", "es6.arrowFunctions"]
-}

packages/babel-cli/test/fixtures/babel/--blacklist/stdin.txt

@@ -1 +0,0 @@
-arr.map(x => x * MULTIPLIER);

packages/babel-cli/test/fixtures/babel/--blacklist/stdout.txt

@@ -1,3 +0,0 @@
-"use strict";
-
-arr.map(x => x * MULTIPLIER);

packages/babel-cli/test/fixtures/babel/--whitelist/options.json

@@ -1,3 +0,0 @@
-{
-  "args": ["--whitelist", "es6.arrowFunctions"]
-}

packages/babel-cli/test/fixtures/babel/--whitelist/stdin.txt

@@ -1,2 +0,0 @@
-let MULTIPLER = 5;
-arr.map(x => x * MULTIPLIER);

packages/babel-cli/test/fixtures/babel/--whitelist/stdout.txt

@@ -1,4 +0,0 @@
-let MULTIPLER = 5;
-arr.map(function (x) {
-  return x * MULTIPLIER;
-});